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Contrec 515 – HC03 Heat Calculator
The 515-HC03 application measures the volume, mass and energy content of fluid in a heating or cooling system by using single or stacked differential pressure mass flow inputs in conjunction with feed and return temperature inputs.
A selection of fluid types and modes makes it suitable for many heating/cooling applications. The instrument calculates the flow according to generic differential pressure equations and incorporates the conditions at which the flowmeter was calibrated.
The instrument calculates the mass flow and energy according to the IAPWS Industrial Formulation (1997) when the fluid type is water, while internal enthalpy and density tables are used for the selection of other industry fluids.
Calculations
The instrument can calculate the mass and energy for the following common industry fluids:
• Water
• Glycol (35% Solution)
• Brine (27% CaC2)
• TYFOXIT F20
• TYFOXIT F40
• Essotherm 500/Thermaloil
• THERMINOL 55
• User Custom Fluid
Formulas:
• mass flow = volume flow
• power = mass flow
Features
Suited for heating and/or cooling operation
Uses IAPWS-IF97 to determine water properties
Selection of common industry fluids using internal tables
Facility for user defined Enthalpy and Density table
Tailored for differential pressure mass meters with single or stacked transmitters
Generic differential pressure flow calculations
Flow meter can be located in feed or return line
Allows for square law and non-linear correction
Selection of second language and user tags
RTC logging with over 1000 entries
Infra-red communications port on front panel
Pulse width and scaling of pulse output
4-20mA retransmission
Selectable protocols on serial ports including Modbus RTU and printer output
Front panel adjustment of 8-24V DC output voltage
Backlit display
LCD Backup Typical plant diagram
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